or back on to yourself is so your sleeve doesn't catch on it and pull you down or pull you over. it's actually a safety issue. when you have stairs like this that look relatively steep, the last thing you really want to do is trip one of your customers coming down into your store. >> that's not a sale. that's not a sale. here we are walking down a stair, i believe this is at the muni station where they have a contrasting color vaguely, barely, almost contrasting color stripe. maybe. an alternative to access that we see, both inside the buildings and in this case outside are lifts in elevators. these are difficult, expensive, hard to maintain, hard to use, hard to keep in maintenance and in fact, in this case down at one of the downtown hotels it's hideously ugly, although that's got nothing to do with it, i guess.